Hello all, Here is my own experience about migrating from 17.0 to 17.1 profile.
I followed the steps 1, 3, 4, 5, 6, 7, 8, 9 and 10 (emerge -1v sys-devel/gcc:8.3.0, emerge -1v sys-devel/gcc:8.2.0-r6) without any issue. Everything works fine but the step 11 (emerge -1v --deep /lib32 /usr/lib32 /usr/lib/llvm/*/lib32) has been pretty painful. Many config phase failed. - dev-libs/glib-2.58.3 Solved by emerging util-linux and libpcre - many x11-libs stuff Solved by emerging some x11-base packages (especially xorg-x11) - dev-libs/libgudev, media-libs/libv4l, x11-misc/colord and media-libs/libcanberra. Solved by emerging virtual/libudev Finally, i could delete the /lib32 (/usr/lib32 was already deleted) and the /usr/local/lib32 symlinks. Now everything seems to work properly. Cheers, -- Jacques